Flanging-machine.



No. 682,725. Patented Sept. l7, mm.- u. LOVEKIN.

FLANGING MACHINE.

(Application filed Apr. 25, 1900.)

7 Sheets-Sheet I.

(No Model.)

INVENTOR:

WITNESSES;

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No. 682,725. Patented Sept. I7, I901. L. D. LOVEKIN.

FLANGING MACHINE.

(Application filed Apr. 25, 1900.)

7 Sheets-Sheet 2.

(No Model.)

INVENTORi WITNESSES.

"Patented Sept. I7, I91.

7 Sheets-Shaot 3.

o LDVEKIN. HANGING MACHINE,

. (Application filad. Ayn. 25, 1900.)

(No mum iNVENTOR:

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Patented Sept. I7, 1911!. L. D. LUVEKIN.

FLANGING MACHINE.

(Application mm Apr. 25, 1900.

7 Sheets-Sheet 4.

(No Model.)

NN NVNBN -YWITNESSES:

INVENTOR:

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No. 682,725. Patented Sept. l7, M".

L. n. LOVEKIN.

FLANGING MACHINE.

(Applica'kion filed. Apr. 25, 1900.) (No Model.) I 7 Sheds-Shoat 6.

FIG .9.

v 1 INVENTOR:

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WITNESSES:

no. 682,725. Patented Sept. I7, l90l.

L. n. LOVEKIN.

FLANGING MACHINE.

'Application filed Apr. 25, 1900.)

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(No Model.)

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UNITED STATES PATENT OFFI E.

LUTHER D. LOVEKIN, OF PHILADELPHIA, PENNSYLVANIA.

FLANGlNG-MACHINE.

SPEGIFICATIQN forming part of Letters Patent No. 682,725, datedSeptember 17, 1901.

' Application filed April 25,1900. Serial No. 14,256. (No model.)

To aZZ whom it may. concern:

Be it known that I, LUTHER D. LovEKIN, a citizen of the United States,residing in the city and county of Philadelphia, in the State ofPennsylvania, have invented certain new and useful Improvements inFlanging-Machines, of which the following is a specification.

My improvements relate to machines employed for expanding or formingflanges upon the ends of pipes or tubular bodies.

Itis the object of my invention to provide a simple, easily operated andadjusted, and efficient machine, by the employment of which flangingoperations upon the ends or lips of tubular bodies may be expeditiouslyand conveniently performed, and in the operation of subject matterclaimed as novel being hereinafter definitely specified.

In the accompanying drawings,

Figure 1 is a view in longitudinal sectional elevation on the dottedline 1 1 of Figure 6, of a machine embodying a good form of myimprovements.

Figure 2 is a view in face elevation, partly in section, of the flanginghead. 7

Figure 3 is a view in vertical section of the flanging head shown inFigure 2, illustrating said head as supported in juxtaposition to apipe, and its roller carrying arms as engaged upon said pipe.

Figure 4 is an elevation view of one of the roller carrying arms of theconstruction shown in Figures 2 and 3, removed from the flanging head. 7

Figure 5 isan elevation view of a modified form of roller carrying arm.

Figure 6 is a view in end elevation of the apparatus shown in Figure 1.

Figure '7 is a transverse section through a cam roller and its bearing,section being supposed on the dotted line 7 7 of Figure 8.

Figure 8 is a longitudinal section of a cam roller and the adjacentportion of the roller carrying arm, exhibiting details of thearrangement of anti-friction rollers which I prefer to employ.

Figure 9 is a view in sectional elevation of a modified form of'flanging head, the carrier arm mounted thereon being shown partly insection andpartlyin full lines, the cam roller of said arm beingillustrated as engaged upon a pipe.

Figure 10 is a view in side elevation looking toward the ,end of theshaft 32,-of the head and roller carrying arm shown in Fig ure 9.

Figure 11 is a view in end elevation of a pipe supporting device and ahead shaft supporting device which I prefer to employ in someoperations.

Figure 12 is a view in side elevation of the parts shown'in Figure 11,illustrating in connection therewith a fianging head the shaft of whichextends through the pipe.

Figure 13 is a detail view of the means for being the shaft upon whichthe head 3 is,

mounted and to which itis secured by a-key or feather.

4 is a driven gear, keyed upon the shaft 2, and in mesh with a drivinggear 5, mounted on the shaft-6.

The shafts 6 and 9 are mounted in parallelism and equipped with a seriesof intermeshed gears, 7, 8, constituting a change gear of well-knownconstruction, the arrangement being, in brief, that the gears upon theshaft 9 are keyed thereto, while the gears 7 upon the shaft 6 arenormallyloose thereon, but one of which last mentioned gears may be madefast with respect to said shaft 6' by the manipulation of a lug-providedlongitudi- I nally adjustable locking spindle 10 mounted in the hollowinterior of said shaft. 6, the lug of which is adapted to engage a lugseat in any one of the gears 7 on the shaft 6.

The shaft 9 is provided with a driven gear 11, in mesh with a drivinggear 12, driven,

through the gear 13 and shaft 14, from any preferred source of power orengine,such as an electric motor diagrammatically illustrated at 15.

The gears 11, '12 and 13, are mounted in a fixed part of the frame Work1, and the shaft 9 is free for longitudinal movement with respect tosaid gear 11, without interruption of its operation. The head shaft andhead, the shaft 6, and the forward end of shaft 9 are all mounted on andcarried by a sliding pedestal16, having movement in the direction ofthe'length of the head shaft upon and with respect to the main frame 1.Conveniently this sliding movement is effected and controlled from theexterior of the machine by the following devices:

17 is a hanger, depending from the pedestal, fixedly engaged in thelower end of which is a threaded sleeve 18, in which, in turn, isengaged a threaded feed shaft l9,the rear end of which,supported insuitable bracket, is provided with a bevel gear 20, in mesh with acorresponding bevel gear 21 on the inner end of a counter shaft, theouter end of which is equipped with any usual hand wheel 79.

Manifestly as the 'wheel 79 is rotated in one direction or the other,the sliding pedestal, carrying the head and the principal portions ofthe driving gear, will be caused to move in one direction or the other,without disturbing the operative connection between said driving gearand the actuating motor. The proportions of the parts and thecorresponding range of longitudinal movement of the sliding pedestalwill be such as the constructor may select.

The flanging head 2, in its preferred form, is very fully illustrated inFigures 2 and 3 of the drawings. As therein shown, said head is providedwith three radially arranged arms 22, each embodying a slide way, 23,said slide ways being formed as channels extending longitudinally ofsaid arms and opening from end to end through the front faces of saidarms. The lips of said openings preferably slightly overhang theinterior portions of the ways,or in other words, the bodies of saidslide ways are all undercut or of breadth in excess of the distancebetween their respective lips.

The head in its preferred form is provided with a series of what I termroller carrying arms, 24, the number employed conveniently correspondingto the number of ways 23 formed in the head, in which ways respectivelythe respective rear or lower ends of said arms are entered and snuglyfitted,-being engaged by the overhanging lips of the openings, whichtake into the recesses 25 (shown in Figure 4) in the respective sides ofsaid'arms.

In the preferred embodiment of my invention, so far as concerns theconstruction of the roller carrying arms,being that especiallyillustrated in Figures 3 and 4,each arm 24 is formed of two members, 26,27,

hingedly related. In this construction, the basal member 27 is reducedin breadth at its upper end, and the rockingmember 26 is provided with apair of depending lugs adapted to embrace the reduced end of said basalmember, and to be pivotally connected thereto by a hinge pin 28, havingsuitable nuts or heads on its respective ends, and passing through saidlugs and reduced end. The reduced upper end of the basal member isrounded off, as shown particularly in Figure 3, to a curve concentricwith respect to the hinge pin, and provided with a series of teeth toconstitute a rack 29. The rocking member 26 of the arm embodies a wormchamber in its lower end, through which extends a shaft 30 equipped witha worm 31 engaged with said rack.

Manifestly by rotation of the shaft 30, the correspondent rotation ofthe worm will occasion the swinging adjustment of the rocking memberupon the hinge pin as a pivot in one direction or the other, and, uponcessation of such rotation of said shaft, said worm will, by itsengagement with the rack, retain the rocking member in the position ofadjustment to which it has been brought.

In certain embodiments of my invention, to-wit, those illustrated inFigures 1 and 5, the roller carrying arms are illustrated as formed eachas a rigid member without the intermediate hinged joint moreparticularly illustrated in Figures 3 and 4;.

32 are a series of screw shafts, one of which is mounted in and extendslongitudinally with respect to each of the slide ways, 23, and each ofwhich is conveniently supported for rotation in a block 33 at the outerend of its Way. Each screw shaft is in threaded engagement with thebasal portion of the roller carrying arm entered for sliding movement inthe Way in which the shaft itself is mounted, with the result thatrotation of a screw shaft 32 will, such shaft being held againstlongitudinal movement, occasion the radial movement toward or from thecenter of the head of said roller carrying arm.

Within a suitable housing in each block 33, is a gear 34 fast upon thescrew-shaft 32 which extends freely through said block. The outer endsof the shafts 32 protrude beyond the blocks 33 and are convenientlyprovided with polygonal heads to which wrenches or similarinstrumentalities may readily be applied.

The head 3 is conveniently built up from a number of matched plates andmembers assembled and bolted together in any convenient manner.

The periphery of the head embodies a circumferential recess 35, intowhich the housings for the gears 34: open, and in said recess ismounted, in such position as to engage the teeth of the gears, anannular rack 36, capable of rotative movement independent of themovement of the head, and conveniently equipped with what I term a rackoperating wheel or extension 37.

The outer end of each roller carrying arm is preferably reduced to forma roller axle 38, as shown in Figures 7 and 8, upon which is mounted acam roller 39, preferably,-although not restrictively,-of the formdepicted in the drawings, in which it is illustrated as having a side ofstraight cylindrical form, merging at its lower or rear end into a skirtor flaring portion the tapering face of which is at an acute angle withreand a second series of rollers of considerably.

smaller diameter 44, alternating with said rollers first named, as shownespecially i Figure 7.

The construction shown in Figure 9, illustrates an embodiment of myinvention in which, instead of a disk-like head provided with a seriesof ways and a series of roller carrying arms,-is provided a head whichrepresents so to speak but a fractional portion of the head shown inFigures 2 and 3, but which is, so far as it extends, substantiallyidentical in arrangement with the construction illustrated in thefigures last named. The flanging head shown in said Figure 9 isillustrated as provided, similarly to the head in Figures 2 and 3,with away extending radially from the head shaft, a screw shaft mounted insaid way, and a roller carrying arm mounted in, for movementlongitudinally with respect to, said way, under the actuation of thescrew shaft, said roller carrying arm being in the main identical inconstruction with the arms illustrated in Figures 2 and 3.

In the construction shown in said Figure 9, however, the basal member ofthe carrying arm is, within the way 23 recessed as to its lower end toreceive a sleeve 45 having a threaded bore. Openings 46 lead from therespective sides of the basal member to said recess, through whichopenings and the threaded bore of the sleeve 45 the screw shaft extends,but engages only with the sleeve. As the result of this arrangement,thestrain upon the threads of the screw shaft 32, when the roller carryingarm in an inclined position is at work upon a pipe, is more evenlydistributed. In the construction shown in Figure 9 the outer end portionof the screw shaft is provided with an enlargement 47, which engaging ina suitable housing in the framework of the head, secures said shaftagainst longitudinal movement.

In the operation of my apparatus, as illustrated, the principal work tobe accomplished flange upon the pipe and at the same time to force it toa seat in the face of an annulus or coupling ring brought to aconvenient position encircling the mouth of the pipe prior to theflanging operation. The purpose of the formation of the flange and theemployment of the annulus, is to providemeans by which pipe sectionsthus equipped may be united or coupled.

My apparatus is adapted, by the employ ment of suitable cam or otherrollers, to produce flanges of any desired character required in the.use of various forms of pipe coupling devices. Inthe operation of myapparatus in its preferred embodiment, to form a flange 48 upon a pipet9, the cam rollers,

as the flanging head rotates, first engage as to their side facesagainst the bore of the pipe end, forcing or expanding said piperadially outward and strongly against the bore of the annulus orcoupling ring 50. To accomplish Referring to Figures 1 and 3, it will bemanifest that upon the rotation of the head shaft, all the parts carriedby such shaft and shown inFigure 1, rotate positively with it, exceptthe annular rack 36, which is free for rotative movement of its own withrespect to said head. When, then, during the rotation of the head,it isdesired to set the arms'slightly outward, the operator may effect thisby placing his hand upon the rack operatingv wheel 37, thereby braking,so to speak, its action, or causing it to rotate transiently at a slowerrate than the flange head, so that as a result of the engagement of thegears 34 (which continue to travel at the same rate of speed as thehead) with said rack, said gears will be caused to rotate upon theiraxes, and the con sequent rotation of the screwshafts 32 oocasions thecorrespondent uniform movement outward of the roller carrying arms,without stoppage of the machine.

On the other hand, if it be desired to set the roller carrying armstoward the center of heavily against the pipe 49, readily determine whenthe rollers have reached the desired set, by observing the increasingdifficulty of retarding said wheel 37. Therefore the comparative ease ordifficulty of retarding said wheel 37 constitutes an accurate gage ofthe pressure the rollers are exerting against the pipe.

Apart from the adjustment of the roller carrying arms in a radialdirection, as already described, said arms may be adjusted by theapplication of a wrench to the polygonal outer ends of the screw shafts.In this adjustment, which of course requires the stoppage of themachine, the roller carrying arms may be set at somewhat differentradial adjustments, if such arrangement should happen to be required forany purpose.

The inclination of the rocking or tilting members 26 of the rollercarrying arms, may be effected through the application of a handle 51,as shown in dotted lines in Figure 3, or a wrench or otherinstrumentality, to the shafts 30, in succession.

In the continued operation of the machine in the production of theflange 4:8 and its depression within the recess of an annulus 50, thefianging head is, after the cam rollers engage against the bore of thepipe, as explained,gradually fed forward, so that the skirts of therollers encounter and deflect outwardly the lip of the pipe, and afterthe lip of the pipe has been turned outwardly as far as can be done withthe axes of the rollers in parallelism with the axis of the pipe, therocking members 26 of the roller carrying arms are tilted to theposition shown in Figure 3, in which position the bodies or straightsides of the rollers are carried away from the interior faces of thepipe, but the skirts of the rollers bear directly and fairly against theouter face of the flange and force it directly against the bottom of therecess in the annulus. The three stages of the operation are indicatedprogressivelyin Figures 4, 5 and 3.

As will be manifest, the alteration of the roller from the positionshown in Figure 4 to the position shown in Figure 3 may be effected inone adjustment of the rocking member 26, or may be gradually broughtabout as a result of several adjustments in succession. This will dependlargely upon the dimensions of the pipe, the number of cam rollerscontemporaneously engaged upon it, and the kind of flange desired to beproduced.

In Figure 5 I show an arrangement in which the axle of the rollercarrying arm is provided with a cap piece, on which are erected a pairof lugs 52, in which is journaled the axle of a deadening roller, as Iterm it, 53, which, after the flange is partly formed or turnedoutwardly, may be brought to bear directly against said flange, and inthe rotation of the head, travel upon said flange and beat it veryfirmly into its recess. The use of this deadening roller may be resortedto for an action supplementary to that of the skirts of the rollers evenafter the rollers have been operated in the position shown in Figure 3.

As will be obvious, the employment of a roller carrying arm of thecharacter shown in Figure 5, equipped with a skirted roller, and alsowith a deadening roller, enables the formation of flanges upon pipes,without resort to a construction of the roller carrier arm in which saidarm is formed of two members hingedly united as shown in Figure 3,as thedeadening roller, bearing upon the flange partly formed by the action ofthe skirt of the roller 39 against the edge of the metal pipe, tocomplete said flange and beat it down within the recess, dispenses withthe necessity of setting said roller 39 at various inclinations.

As will be understood, of course, in the employment of the structure forthe purpose of expanding tube ends, apart from the formation of flanges,no setting of the rollers at an angle will be ordinarily required.

-Any desired number, sequence, and form, of flanging or cam rollers maybe employed upon a roller carrying arm.

In some constructions of my apparatus, the head shaft terminates, as toits front end, as shown in Figure 1, at a point about abreast of thebases of the slide ways 23, such shaft being in such constructionsupported at its rear end only.

In some instances, however, it is desirable to support said shaft at itsfront end also, and I have accordingly devised for the purpose themechanism shown in Figure 11.

In the construction shown in said last mentioned figure, 54 is apedestal erected upon the main frame of the machine in a position inproximity to the flanging head, embodying a concave recess 55 at itsupper edge, in which rests the pipe to be operated upon, and providedwith an arciform cap plate 56 which rests upon the top of the pipe andis secured as to its respective extremities by nut provided bolts orother suitable instrumentalities 57, to lugs 58 with which the pedestal51 is equipped.

Manifestly by tightening up the bolts 57 the cap plate 56 will be drawntightly down upon the pipe and pedestal and hold the pipe firmly inposition.

59 is what I term an adjustable shaft supporting spider, the sameembodying a hub 60 and a series of radially extending shanks or arms 61,adjustable as to length, and equipped with feet which bear against theinner face of the pipe.

Each shank or arm 61 is made adjustable as to length in any preferredmanner. Conveniently such adjustment is secured by forming each with athread, and entering its inner end in a correspondingly threaded socketin the hub 60, so that by rotation of a shank it may, within givenlimits, be set in or out a desired distance.

The feet at the ends of said shanks are conveniently formed of parallelplates 62 and (33,

the plates 62 being rigidly mounted on the extremities of the arn1s61,and the plates 63 being arranged with their outer faces, whichcorrespond approximately to the curvature of the pipe surface,.incontact with the wall of the pipe.

The plates 62 and 63 may be maintained in working relationship by balls64 engaged in suitable recesses in the opposing faces of said plates.

As will be understood, this method of joining the plates 62 and 63together, allows the rotation of the plates 62 and arms 61 upon theirown axes to bring them to any desired set without dismantling the spideror withdrawing it from the pipe. In the rotation of the head shaft thehub 60 forms a firm stationary bearing for its advance end, supportin gsaid shaft axially with respect to the pipe, and allowing said shaftfreedom for both rotative and longitudinal movement.

In the pipe supporting device shown in Figures 1 and 6, 65 are a pair ofpipe supporting pedestals the bases of which are entered free forsliding movement toward and from each other transversely with respect tothe axis of a pipe operated upon, the lower ends of said pedestals 65being entered in a transversely extending way 66, (Figure 1.)

The movement of said pedestals toward and from each other isconveniently accomplished through the agency of a right and left handscrew 67 disposed beneath the way 66 and engaged in suitable threadedlugs depending from said pedestals, said screw being convenientlymanipulated by means of the hand wheel 68.

The opposing faces of the pedestal are provided with a pair of clamps69, each removably mounted in any preferred manner upon the pedestalwhich supports it.

The clamps 69 69 are of approximate crescent shape in profile, theconcave faces which present toward or oppose each other, being ofuniform diameter and conform generally to the curvature of the pipe tobe supported, the preferred arrangement being one in which a machineintended for operation upon pipes of various sizes, will be providedwith a series of pairs of clamps 69 of different sizes, that pair whichmost closely conforms to the curvature of the pipes operated upon at anygiven time, being placed in the machine for the purpose of suchoperation.

Each clamp is provided as to its inner face with a vertically extendingrecess 70, the bottom of which is from the upper end of the clamp to thelower, of such curvature as to conform to the rim of the annulus orcoupling ring 50, which latter placed between the two clamps, rests asto its outer side edge within the respective recesses of the opposingclamps and bears and fits against the bottoms of said To secure theannulus or coupling head of each screw being (before the pipe is mountedin position) exposed in position for.

manipulation for the tightening up of the screws, and the advance endsof the screws As will be manifest the coupling rings 50 may be veryquickly secured in position by' setting up the pedestals 65 under therotation of the screw 67, and then tightening up the screws 71.

After the coupling ring is mountedlinposition, the pipe 49 is insertedthrough said" ring,and, its outer or distant end being supported in anydesired manner, its inner end is secured by a pair of bands 72, 73. The

band 72 passes across the top of the pipe, and. is as to its respectiveends provided with the blocks 74, the outer ends of which are s ecuredby the bolts 75 to lugs 76 mounted on or secured to the respectiveclamps 69.v The band 73 passes beneath the pipe and is as to itsrespective ends provided with blocks 77" secured by bolts 78 directly tothe under faces of the respective blocks 74. As will be .understood,when work is done upon a succession of pipes of a given size, the band72 remains secured by the bolts 75 to the lugs 76, and is not loosenedas one pipe after another is removed and replacedby another.

When the clamps 69 are removed the bands 72 and 7 3 are of course takenwith the clamps, and the substitute clamps then applied are of courseprovided with their own bands of like organization and application.

It is', of course, to be understood that the device mounted in the pipefor the support of an end of the head shaft projecting there- .into, andshown in Figure 11, and which devices are preferably used whenever thehead shaft is formed of suflicient length to project within thepipe,--may be used conjointly with my special form of devices exteriorto the pipe and employed, as shown in Figure 1, to secure the pipeoperated upon fixedly in position.

Having thus described my invention, I claim and desire to secure byLetters Patent 1. In a flanging machine, in combination, a flanginghead, a motor, a sliding pedestal on which said head is mounted, gearingconnective of the motor and head, and two members of which may beadjusted with respect to each other without interrupting the operationof the gearing, a screw shaft engaged with a threaded member carried bysaid pedestal, and a manually operated device upon the exterior of themachine the rotation of which occasions the rotation of said shaft,substantially as set forth. p

2. In combination, a rotatable head, an arm mounted on said head andadapted to move toward and from the center thereof, a radially disposedscrew shaft in threaded engagement with said arm, a rack mounted on saidhead free for rotation independently of said head, and a connectionbetween said shaft and said rack, substantially as set forth.

In a flanging machine, in combination, a rotatable head, an arm carriedby said head and adapted to have radial movement with respect thereto, aradially disposed screw shaft in threaded engagement with said arm, anannular rotatable device in association with said head and free forrotative movement independent thereof, and a connection between saidscrew shaft and said rotative device whereby rotation of said deviceoccasions the rotation of said screw shaft, substantially as set forth.

4.. In a fianging machine, in combination, a

rotatable head, an arm mounted on said head and adapted to move towardand from the center thereof, a radially disposed screw shaft in threadedengagement with said arm, a rack mounted on said head free for rotationindependently of said head, a gearing connective of said shaft and saidrack, and an operating wheel connected with said rack, substantially asset forth.

5. In a Hanging machine, in combination, a rotatable head, a series ofroller provided arms adapted for radial movement toward and from thecenter of said head, radially disposed screw shafts in threadedengagement with the respective arms, a rack mounted on said head andfree for rotative movement i11- dependent thereof, an enlargement oroperating wheel connected to said rack, and gears which operativelyconnect said screw shafts and said rack, substantially as set forth.

6. In combination, a rotatable head embodying a series of radial ways,arms mounted in said Ways and free for movement longitudinally thereof,screw shafts mounted in said ways in threaded engagement with said arms,gears mounted on said shafts, an annular rack mounted on said head freefor movement independent thereof, and an enlargement or operating wheelconnected to said rack, substantially as set forth.

7. In combination, a rotatable head, undercut ways formed in said head,arms mounted in said ways, shafts mounted in said ways in threadedengagement with said arms, housings at the ends of said ways openinginto an annular rack recess, gear wheels mounted on said shafts anddisposed within said housings and opening into said rack recess, and anannular rack mounted in said rack recess, substantially as set forth.

8. In a flanging machine, in combination with a flanging head, a rollercarrying arm consisting of two members, the first of said members havinga lug provided with teeth arranged in a curved series, the other orsecond member having a lug overlapping said lug first referred to, apivot passing through said lugs, and a rotatable Worm carried by andmoving with the second member, and in engagement with said curved seriesof teeth, substantially as set forth.

9. In combination, a rotatable flanging head, a series of radiallydisposed ways, a series of radially disposed screw shafts mounted insaid Ways, gears mounted one on each of said shafts, an annular rackengaged with said gears and having rotative movement independent of thehead, a series of roller carrying arms engaged with said shafts and eachconsisting of two members pivotally united and provided with means formoving one member to and securing it in different positions ofinclination with relation to the other member, substantially as setforth.

10. In a flanging. machine, a roller carrying arm, and means forsupporting and rotating the same, an axle mounted on the end of saidarm, a cam roller mounted on said axle, a second roller bearing mountedon the outer end of said roller axle, and a deadening roller mounted insaid roller bearing with its axis of rotation transverse orperpendicular to that of the cam roller, substantially as set forth.

11. In combination, a fianging head, a head shaft, means for supportingand occasioning the rotation of said head and shaft, a pair ofpedestals, means for moving said pedestals toward and from each other, apair of clamps carried by said pedestals and having facing grooves toreceive an annulus, and screws which secure an annulus in said grooves,said screws being mounted in said clamps with their axes in parallelismwith the head shaft, so as to present against the side face of theannulus, substantially as set forth.

12. In combination with a pair of supporting clamps adapted to anannulus or coupling ring, lugs projecting from said clamps, a pipesecuring band having at each end blocks adapted to be securedrespectively to the respective lugs, and a second band having at eachend blocks adapted to be secured respectively to the respective blocksof the band first mentioned, substantially as set forth.

13. In combination with a pair of supporting clamps adapted to anannulus or coupling ring, lugs projecting from said clamps, two pipesecuring bands each having a block at each end, one adapted to passbeneath the pipe and the other over it, and means for quickly connectingsaid blocks detachably to the lugs of the clamps.

In testimony that I claim the foregoing as my invention I have hereuntosigned my name this 9th day of April, A. D. 1900.

LUTHER D. LOVEKIN.

In presence of F. NORMAN DIXON, Tnos. K. LANCASTER.

